From design and manufacture to procurement and logistics, every stage of the supply chain must become more efficient, experts say
Senators are scrambling to rescue the wide-ranging energy bill, as President Obama unveils new fuel tax and green transportation plan
Environment (Wales) Bill commits country to slashing emissions by 80 per cent by 2050, and puts natural environment at heart of policy making
Major energy reform bill promising new energy efficiency and grid upgrade programmes under threat, as Democrats seek aid package for Flint crisis
Leading group of environmentalists warns that leaving the European Union would mean a return to filthy beaches, foul air and weak conservation laws
Government's climate change advisory body says targets are enough for now despite ramped-up global ambition of the Paris deal
French foreign minister says efforts to fight climate change will be given a push if heads of government ratify the deal
Lord Bourne says full detail of new domestic energy efficiency strategy not due until 2018
Reports suggest authorities are stepping up investigations in wake of VW emissions-rigging scandal
Law firm ClientEarth says it will seek urgent court action because of the risk to people's lives from dangerous emissions